Welcome to Astrobase!

To get started, run the simulation by clicking Play (or press Space). Control speed by moving the needle or the keyboard arrow keys.

The model synchronizes planetary positions with NASA’s Horizons data. At 1× speed, 1 day in the model equals 1 second of real time.

Distances are proportional but planet sizes are not poroportional.

Set custom dates using the top-center date control (Enter), and move day-by-day with the arrow buttons. Loading might take a few seconds depending on internet connection.

On Mobile, two-finger drag moves the simulation’s position and one-finger drag changes the angle.

Astrobase is a database containing planetary constellations. You can browse by month for a given year, or select a specific date (e.g., your birthday) and display all constellations for that date across years.
Current content: 1900–2150 with ~95% accuracy.

Clicking a constellation shows an AI-generated astrology interpretation based on the selected tradition. The Display button lets you quick-select the constellation and show it in the simulation.

Use visual aids to analyze constellations with overlays and geometric axes.

• The birth zodiac sign is opposite Earth’s heliocentric position. The Heliocentric axis shows this and also highlights inner-planet greatest eastern and western elongations at ~90° to Earth, as well as heliocentric conjunctions.
• The Nightline indicates when an outer planet is visible during the day vs. the night.
• Geocentric conjunctions: select a second planet to draw a line through both; use this to see when a third body aligns with them.
• The Sun wedge shows when a planet is lost in sunlight. You can set its direction and adjust the angular tolerance.

The console shows whether the model is syncing correctly with NASA’s Horizons data, and indicates when an inner planet is prograde/retrograde relative to Earth, or when Earth is prograde/retrograde relative to an outer planet.

You can verify accuracy with coordinates. For example, the zodiac ring should place Earth at the Virgo–Libra boundary around the March equinox, and the labeled first-of-month rays should align with their respective calendar dates.

Empty for now.